<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
	<style type="text/css">
		*{
			margin: 0;
			padding: 0;
		}
		.banner{
			width: 1200px;
			height: 500px;
			margin: 0 auto;
			position: relative;
			
		}
		.banner img{
			width: 100%;
			display: none;
		}
		.banner .active{
			display: block;
		}
		.icon{
			position: absolute;
			bottom: 58px;
			left: 50%;
			transform: translateX(-50%);
		}
		.icon span{
			display: inline-block;
			width: 20px;
			height: 20px;
			background-color:rgba(0, 0, 0, 0.5) ;
			color: #fff;
			text-align: center;
			line-height: 20px;
			font-size: 12px;
		}
		.icon .select{
			background-color: #fff;
			color: #000;
		}
		.left,.right{
			position: absolute;
			top: 50%;
			transform: translateY(-50%);
			width: 40px;
			height: 80px;
			line-height: 80px;
			text-align: center;
			background-color: rgba(0, 0, 0, 0.5);
			color: #fff;
		}
		.left{
			left: 0;
		}
		.right{
			right: 0;
		}
		.left:hover{
			cursor: pointer;
		}
		.right:hover{
			cursor: pointer;
		}
	</style>
</head>
<body>
	<div class="banner">
		<div >
			<img src="../img/x1.webp" class="active">
			<img src="../img/x2.webp">
			<img src="../img/x3.webp">
			<img src="../img/x4.webp">
			<img src="../img/x5.webp">
		</div>
		<div class="icon">
			<span class="select">1</span>
			<span>2</span>
			<span>3</span>
			<span>4</span>
			<span>5</span>

		</div>
		<div class="left"><</div>
		<div class="right">></div>
	</div>
	<script type="text/javascript">
	 var imgs = document.querySelectorAll(".banner img")
	 var spans = document.querySelectorAll(".icon span")

	 for (let i = 0; i < spans.length; i++) {
	 	spans[i].onclick = function(){
	 		document.querySelector('.active').className = ""
	 		document.querySelector('.select').className = ""
	 		this.className = 'select'
	 		imgs[i].className = 'active'
	 	}
	 }

	 // 获取有点击事件
	 let right = document.querySelector('.right')
	 right.onclick = function(){
	 	let select = document.querySelector('.select')

	 	if (select.nextElementSibling == null) {
	 		spans[0].onclick()
	 	}else{
	 		// 当前点击右侧按钮是，相当于点击当前span的下一个兄弟元素
	 		select.nextElementSibling.onclick()
	 	}
	 	
	 }

	 // 获取左点击事件
	 let left = document.querySelector('.left')
	 left.onclick = function(){
	 	let select = document.querySelector('.select')

	 	if (select.previousElementSibling == null) {
	 		spans[4].onclick()
	 	}else{
	 		// 当前点击右侧按钮是，相当于点击当前span的上一个兄弟元素
	 		select.previousElementSibling.onclick()
	 	}
	 	
	 	
	 }
	</script>
</body>
</html>